| 显色条件对酸性土壤有效磷测定的影响研究 |
| |
| 引用本文： | 陈玲霞,吴国霖,李春生,徐传云.显色条件对酸性土壤有效磷测定的影响研究[J].现代农业科技,2014(5):235-236. |
| |
| 作者姓名： | 陈玲霞 吴国霖 李春生 徐传云 |
| |
| 作者单位： | 浙江省地质矿产研究所;福建省闽北地质工程勘察院; |
| |
| 摘 要： | 为了探讨应用Bray-Kurtzl法测定有效磷时显色条件对磷标准曲线以及样品有效磷含量的影响,在标线溶液和样品浸提液中加入钼锑抗显色剂后,分别放置于20、25、30℃水浴或空气中显色30 min,测定其吸光度。结果表明:标准曲线溶液在20℃和25℃的空气和水浴中、30℃的空气中均无法完全显色,导致吸光度偏低;在30℃水浴中能很好地显色,得到合格的标准曲线。样品浸提液则对显色条件要求不高,各条件下均能得到相似的结果。
|
| 关 键 词： | 酸性土壤 有效磷 显色温度 显色环境 |
Influence of Coloration Conditions on Determination of Available Phosphorus in Acidic Soil |
| |
| Authors: | CHEN Ling-xia WU Guo-lin LI Chun-sheng XU Chuan-yun |
| |
| Institution: | 1 Zhejiang Institute of Geology and Mineral Resources, Hangzhou Zhejiang 310007; 2 Northern Fujian Institute of Geo-engineering Exploration ) |
| |
| Abstract: | In order to investigate the effects of the coloration condition on drawing phosphorous standard curves and on determining available phosphorus contents of samples when applying Bray-Kurtzl method ,standard solutions and sample extracts were placed under water bath or air conditions at 20℃,25℃,30℃respectively for 30 min after adding Mo-Sb chromogenic agent and then measured. The results showed that in water bath at 20℃and 25℃,or air conditions at 20℃,25℃,30℃,standard solutions could not react completely ,resulting in low absorbance. While in 30℃water bath,the standard curve was good. For sample extracts,the coloration condition was not so important,and similar results were obtained under all experiment conditions. |
| |
| Keywords: | acidic soil available phosphorus coloration temperature coloration environment |
| 本文献已被 CNKI 维普 等数据库收录！ |
|
